Running a start-up business is one of the most rewarding endeavors you can undertake, but it's not without its fair share of trials and tribulations. Thankfully, our trusty smartphones have become precious, pocket-sized powerhouses able to make the task that little bit easier.

The world's largest software maker has to convince developers to write apps for the new version of its widely used operating system. But it also needs to win over customers, from consumers to businesses. That's no simple task.

Google already has startup hubs in London and Tel Aviv, which nurture young tech firms. But a new network will cover seven lesser-known pockets of startup activity, from Chicago to Nashville to Minneapolis.